<template>
	<div class="topbar">
		<!-- 顶部栏 -->
		<mt-header fixed title="Vue练手项目-不知道起啥名字">
			<mt-button icon="back" slot="left" @click="goBack" v-show="goBackShow">返回</mt-button>
		</mt-header>

		<!-- 组件 -->
		<transition>
			<router-view></router-view>
		</transition>

		<!-- 底部切换栏 -->
		<nav class="mui-bar mui-bar-tab">
			<router-link class="mui-tab-item-fix" to="/home">
				<span class="mui-icon mui-icon-home"></span>
				<span class="mui-tab-label">首页</span>
			</router-link>
			<router-link class="mui-tab-item-fix" to="/member">
				<span class="mui-icon mui-icon-contact"></span>
				<span class="mui-tab-label">会员</span>
			</router-link>
			<router-link class="mui-tab-item-fix" to="/shopcar">
				<span class="mui-icon mui-icon-extra mui-icon-extra-cart"><span class="mui-badge"
						id="badge">{{this.$store.state.oldQuantity}}</span></span>
				<span class="mui-tab-label">购物车</span>
			</router-link>
			<router-link class="mui-tab-item-fix" to="/search">
				<span class="mui-icon mui-icon-search"></span>
				<span class="mui-tab-label">搜索</span>
			</router-link>
		</nav>
	</div>
</template>

<script>
	export default {
		data() {
			return {
				goBackShow: false,
			}
		},
		methods: {
			goBack() {
				this.$router.go(-1);
			}
		},
		created() {
			if (this.$route.path == '/home') {
				this.goBackShow = false;
			} else {
				this.goBackShow = true;
			}
		},
		watch: {
			'$route.path'(newVal) {
				if (newVal == '/home') {
					this.goBackShow = false;
				} else {
					this.goBackShow = true;
				}
			}
		}
	}
</script>

<style scoped>
	.topbar {
		padding-top: 40px;
		padding-bottom: 50px;
		overflow-x: hidden;
	}

	.mint-header {
		z-index: 999;
	}

	.v-enter {
		opacity: 0;
		transform: translateX(100%);
	}

	.v-leave-to {
		opacity: 0;
		transform: translateX(-100%);
		position: absolute;
	}

	.v-enter-active,
	.v-leave-active {
		transition: all 0.5s ease;
	}

	.mui-bar-tab .mui-tab-item-fix {
		display: table-cell;
		overflow: hidden;
		width: 1%;
		height: 50px;
		text-align: center;
		vertical-align: middle;
		white-space: nowrap;
		text-overflow: ellipsis;
		color: #929292;
	}

	.mui-bar-tab .mui-tab-item-fix .mui-icon {
		top: 3px;
		width: 24px;
		height: 24px;
		padding-top: 0;
		padding-bottom: 0;
	}

	.mui-bar-tab .mui-tab-item-fix {
		display: table-cell;
		overflow: hidden;
		width: 1%;
		height: 50px;
		text-align: center;
		vertical-align: middle;
		white-space: nowrap;
		text-overflow: ellipsis;
		color: #929292;
	}

	.mui-bar-tab .mui-tab-item-fix .mui-icon~.mui-tab-label {
		font-size: 11px;
		display: block;
		overflow: hidden;
		text-overflow: ellipsis;
	}

	.mui-bar-tab .mui-tab-item-fix {
		display: table-cell;
		overflow: hidden;
		width: 1%;
		height: 50px;
		text-align: center;
		vertical-align: middle;
		white-space: nowrap;
		text-overflow: ellipsis;
		color: #929292;
	}

	.mui-bar-tab .mui-tab-item-fix.mui-active {
		color: #007aff;
	}

	.mint-button:active {
		color: #fff;
		background-color: transparent;
	}
</style>